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UNITED sTATEsrATENT ol E13"ioE,f g

CEAS. E. BRowN,lor WARREN, RHoDE ISLAND.

CONNECTION 0F TELESCOPIC VIIIQAS'JIS lAND SPARS.

Specification of Letters Patent No. 85164', dated June 17,- 1.851. A

To all whom it may concern:

Be it known that I, CHARLES F. BROWN, ofWarren, in the county lof 'Bristol and. State of Rhode Island, have invented a new and useful improvement in the mode of forming connections in tubular metallic or telescopic masts yards'and other spars -of ships and other vessels; and I do hereby declare thatthe following is a full, clear, and exact Adescription of the same, reference being had' to the accompanying drawings, forming part of this specification, in which- A Figure l, is an elevation of a lower mast and yard. Fig. 2, is a' longitudinal section of the mast. Fig. 3', is a longitudinal section of the yard and Fig. 4, is a transverse section of the same. Fig. 5, isa top view of the mast. Fig. 6 is a longitudinal section of a yard exhibiting a modification in the construction. l

Similar letters/of reference indicate corresponding part's in each of the several gures. j

The nature'of my invention consists in connecting 'the tubes together and adjusting them 'by' means of a screwed rod orrods running longitudinally through them each rod being securedin one tube so as vto be incapable of turning and passing through' a nut or nuts in one or more of the other` tubes, the whole series'of tubes being adjustable one within another by turning those in which are the nuts so as (to .move the nuts along the screw on the rod, and each tube I being capable of secured by set screws at Various points of its length.

To enable others skille'd in the art to make'. and use my invention I will proceed to describe fully its construction and practical application.

A, Figs. 1,12, 3, and 4 represents the outermost or largest tube which in the mast is the lower one, and inVV the yard the middle one. Y

At the bottom of the mast or middle ofthe yard -there is a socket B, see Figs. 2, 3, and

6, in which is secured a rod C, screwed along 'its whole length or any suitable portion of it. 'The rod may be secured in this socket by a pin a, passing through them andthe j tube, or by .any other means which will prevent its turning, thevsocket maybe also secured in the tube by the same pin, or by other means. In the mast the rod will be yard, in both directions from the center. D, and E, are the inner tubes, D, fitting 1n A, and E, in D; in thefyard these tubes h only required to proceed upwards, but in the Y will have to bein ea'ch end of A; at the.60`

lower or vinner end of each of these tubes a nut I", is securedso as to ber capable of turn- 'ing with it ;1 these nuts t the screwed rod C, and by turning either tube in the one encasingit, itmay bescrewed into or out from it. In each incasing tube nearits end, there. are one for more holes, through either of which a set screw al, passes-and is screwd` i/nt'o'ope of a row of holes b, in the tube inside it, the said holes vhaving female screws 'inside them, by these means the tubes may be secured in various positions and"the length vof the yard or mast may be varied. G,'Figs. l, and@ and 5, is the round top which may be of wrought or cast iron and secured to the mast in any suitable manner.

H, Figs. 1,3, and 6, are plugs of wood intubes E, of the yard, to preserve their forml and givethem vthe necessary strength where the mortice is cut through to receive the, sheave o, for the sheet.

' y The difference in construction between the if.

yard represented in Fig. '6, and that in Fig.' 2, consists only in employing vseparaterods for connecting each two of the tubes; that:` i 0, being shortened and only serving to con.` "nect'A, and D, and other short rods CV bevserted in -the ends of thev smallest or end The upper masts Aare to be formed in the i same manner as the lower ones, vandfit into them, and are to be' connected by other Ascrewed rods secured to the -upper joints of the masts immediately below them. The spare masts and spars when-stowed away can be screwed asfar as possible into yone another; or the screwed rods-may be taken out, when theymay be slipped into one another, the length will then be very much reduced, and very little room will be occupied by them. The screw and nut formsa very -v secure connection which admits of great ac'- -curacy in'the Vadjustment of the length and also' of the length beiiig easily altered.

' Anyspars may be constructed in thesame im manner, but as all partake either of the miV rod C, or screwedrods C, and C,Vnuts and..

female screWsF, and set screws d, or theirV equivalents, the Whole being inserted in and secured or attached to the tubes, and operat- .15

ing in the manner substantially 'as herein set forth. l A o. F. BROWN. 'Vitnesses: y

SAMUEL' RANDALL,

G. -W. CARR.

y WMMMM 

